JP2002333205A - Hot-water supply apparatus for bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot-water supply apparatus for bathtub which can accurately fill a bathtub with hot water with respect to a set water level without being affected by piping conditions, etc., by filling the bathtub with hot water by designating the set water level at and after the second filling time. SOLUTION: When this hot-water supply apparatus fills the bathtub 11 with hot water for the first time, the apparatus supplies the hot water by the first-time hot water supply quantity. Then the apparatus sets a plurality of set water levels by using the then water level as a reference water level and stores the set water levels and their corresponding hot-water supply quantities in a storing means. Consequently, accurate data can be acquired about the relation between the set water levels and corresponding hot-water supply quantities. At the next time of filling the bathtub with hot water, the hot-water supply apparatus can accurately fill the bathtub 11 with hot water to a set water level by designating the set water level and supplying the hot water by the quantity corresponding to the set water level based on the data stored in the storing means. The hot-water supply apparatus has an automatic additional hot-water supplying function for supplying hot water heated to a temperature falling within the temperature range from a set temperature to a temperature higher than the set temperature by a prescribed value in accordance with the temperature of the hot water in the bathtub 11 to the bathtub 11 when the water level in the bathtub 11 drops.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply apparatus for a bathtub having an automatic hot water filling function.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No.
As described in the publication, in a circulation warming type hot water supply device for a bathtub having an automatic hot water filling function, an outgoing pipe and a return pipe of a circulation path are connected to a circulation fitting of the bathtub, and an outflow pipe of the circulation path is connected. Is provided with a circulation pump and a warming heater, and a return pipe is provided with a circulation electric valve and a pressure sensor. A hot water supply path for supplying hot water adjusted to a set hot water temperature by a mixing valve is connected to the circulation path, and a hot water supply electric valve and a flow rate sensor are provided in the hot water supply path.

[0003] Then, at the time of initial filling with no data such as the size of the bathtub, the electric valve for hot water supply and the electric valve for circulation are opened, and the hot water supply line is passed through two pipes, an outgoing pipe and a return pipe. When the bathtub is supplied with hot water and a predetermined amount of hot water is supplied, the electric valve for circulation is closed and the bathtub is supplied with hot water through one pipe of the going pipe so that the water level in the bathtub can be detected by the pressure sensor. Then, when the water level in the bathtub reaches the height of the circulation fitting and the water pressure in the bathtub is applied to the pressure sensor, a pressure change occurs, and the pressure change point is used as a reference to the set water level at the time of the first hot water filling. It is covered with hot water. At this time, the correspondence between the water level and the hot water supply amount is stored in the storage means while data is being acquired.

At the time of the next or subsequent hot water filling, the water level is designated, and the hot water for the hot water supply amount corresponding to the designated set water level is determined based on the correspondence between the water level and the hot water supply amount stored in the storage means. Is supplied to the bathtub from the hot water supply channel through two pipes, i.e., an outgoing pipe and a return pipe of the circulation path, and is filled to a designated set water level.

There is also a hot water filling method in which a hot water supply amount is set and hot water corresponding to the set hot water supply amount is supplied to a bathtub.

[0006]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Laid-Open No. 6-1
As in the hot water supply device for bathtub described in Japanese Patent No. 47643, the set water level can be designated at the next hot water filling, and the hot water can be filled.
There is an advantage that the target water level can be easily obtained. However, at the time of the first filling, the level of the hot water to be supplied into the bathtub reaches the height of the circulation fitting, and the relationship between the water level and the hot water supply amount is set based on the pressure change point at which the pressure change of the pressure sensor occurs. Therefore, depending on the piping conditions, such as incomplete air bleeding in the piping or the installation of the piping being bent largely vertically in order to bypass obstacles, etc., it may be provided in the return piping. Since the pressure detection by the pressure sensor is affected, it is not possible to accurately collect data at the time of the first filling, and at the next filling, the set water level differs from the actually filled water level. There is a problem that can not be tensioned.

In the hot water filling method in which a hot water supply amount is set and hot water corresponding to the set hot water supply amount is supplied to the bathtub, it is not necessary to detect a pressure change point during the hot water filling. There is an advantage that the degree of freedom of conditions is high. But,
To fill the hot water with the amount of hot water, the hot water must be repeatedly filled in order to obtain the target water level, and there is a problem that a complicated setting operation is required. There is a problem that after the completion of the hot water filling, additional hot water cannot be supplied and the water level cannot be changed.

The present invention has been made in view of such a point, and it is possible to specify a set water level after the next hot water filling, and to fill the water without affecting by the piping conditions. It is an object of the present invention to provide a hot water supply device for a bathtub that can be hot-watered.

[0009]

According to a first aspect of the present invention, there is provided a hot water supply apparatus for a bathtub, wherein hot water supply means for supplying hot water to the bathtub, a flow rate sensor for detecting an amount of hot water supplied to the bathtub by the hot water supply means, A water level sensor for detecting the level of hot water to be supplied, storage means for storing a relationship between a set water level of hot water supplied to the bathtub and a corresponding hot water supply amount, and a preset value at the time of the first filling of the bathtub. The first hot water supply amount is supplied by the hot water supply means, a plurality of set water levels are set with the water level detected by the water level sensor as a reference water level, and the plurality of set water levels and the corresponding hot water supply amounts are stored. Means, and at the next bathing of the bathtub,
And a control unit for supplying hot water by the hot water supply unit at the set water level specified based on the data stored in the storage means.

[0010] Then, at the time of the first filling of the bathtub, a predetermined amount of the first filling hot water supply amount is supplied, and a plurality of set water levels are set using the water level at this time as a reference water level.
By storing the plurality of set water levels and the corresponding hot water supply amounts in the storage means, the relationship between the plurality of set water levels and the corresponding hot water supply amounts can be accurately obtained without being affected by piping conditions or the like. Therefore, at the time of the next filling, the designated water level is designated and the water is filled. At the same time, the amount of hot water supplied at the designated water level specified based on the data stored in the storage means is supplied, so that the accurate filling of the set water level is possible. Becomes

According to a second aspect of the present invention, in the hot water supply apparatus for a bathtub according to the first aspect, after the completion of the hot water supply, the control section specifies a set water level higher than the water level of the hot water. The hot water supply means supplies hot water to a set water level designated based on data stored in the storage means.

After completion of the filling, when the set water level above the filled water level is designated, the hot water is supplied to the designated water level specified based on the data stored in the storage means. The water level can be changed later.

According to a third aspect of the present invention, in the hot water supply apparatus for a bathtub according to the first or second aspect, the control unit includes:
At the time of the next hot water filling, based on the data stored in the storage means, when there is data of the hot water supply amount of the designated set water level, the hot water supply amount is supplied by the hot water supply means, and when there is no data, At the set water level lower than the specified set water level, the hot water supply of the set water level with the hot water supply data is supplied by the hot water supply means, and then the hot water supply means supplies the hot water to the specified set water level while checking the water level with the water level sensor. The hot water supply amount at the set water level at this time is stored in the storage means.

Then, at the time of next hot water filling, if there is data of the hot water supply amount of the designated set water level based on the data stored in the storage means, the hot water supply amount is supplied. Is set at a set water level lower than the specified set water level.After the hot water supply amount of the set water level with the hot water supply data is supplied, the hot water is supplied to the specified set water level while checking the water level. Since the amount is stored in the storage means, the hot water is accurately filled even at the set water level where there is no data of the hot water supply amount, and at the same time, the data is collected and used at the next hot water filling.

According to a fourth aspect of the present invention, in the hot water supply apparatus for a bathtub according to any one of the first to third aspects, the control unit is configured to supply the water to the set water level one level higher than the reference water level at the time of the first hot water filling. The hot water supply amount at this time is stored in the storage means as a provisional hot water supply amount for one set water level, and the next time the hot water is filled, the data of the hot water supply amount of the specified set water level and the setting below this set water level If there is no data of the hot water supply amount of the water level, the hot water supply amount is obtained by subtracting the provisional hot water supply amount corresponding to the water level difference from the set water level with the hot water supply data at the set water level above the specified set water level After the hot water is supplied by the means, the hot water is supplied by the hot water supply means to the designated water level while the water level is checked by the water level sensor, and the amount of hot water at the set water level at this time is stored in the storage means.

Then, at the time of the first hot water filling, hot water is supplied to the set water level immediately above the reference water level, and the amount of hot water supplied at this time is stored in the storage means as a temporary hot water supply amount for one set water level. When there is no data of the hot water supply amount of the specified set water level and the data of the hot water supply amount of the set water level below this set water level, the set water level having the hot water supply amount data at the set water level above the specified set water level After the hot water supply amount obtained by subtracting the provisional hot water supply amount corresponding to the water level difference from the above, the hot water is supplied to the specified water level while checking the water level, and the hot water supply amount at the set water level at this time is stored in the storage means. Even if the set water level has no hot water supply data, the hot water is accurately filled, and at the same time, the data is collected and used at the next hot water filling.

According to a fifth aspect of the present invention, in the hot water supply apparatus for a bathtub according to the fourth aspect, the hot water supply means includes a hot water supply path for supplying hot water, and an outgoing pipe connected between the hot water supply path and the bathtub. A circulation path having a water level sensor and a return pipe, a circulation pump provided in the circulation path, and a flow switch for detecting circulation of hot and cold water in the circulation path. At the set water level above the specified set water level, after the hot water supply amount is subtracted from the provisional hot water supply amount corresponding to the water level difference from the set water level having the hot water supply data, the circulation pump is operated. Then, circulation is confirmed by a flow switch.

When the hot water supply means has a hot water supply path, a circulation path, a circulation pump, and a flow switch, the next time the hot water is filled, the hot water supply is started at a set water level higher than the specified set water level and from a set water level with the hot water supply amount data. After the hot water supply amount is subtracted from the temporary hot water supply amount corresponding to the water level difference, the circulation pump is operated and the circulation is checked by the flow switch.If the circulation is confirmed, the connection position of the circulation path to the bathtub is obtained. It is understood that there is a water level above and that the water level sensor provided in the circulation path can accurately detect the water level, and it is possible to accurately supply the hot water to the specified set water level while checking the water level.

A hot water supply apparatus for a bathtub according to a sixth aspect of the present invention is the hot water supply apparatus for a bathtub according to any one of the first to fourth aspects, wherein the hot water supply means is a hot water supply path for supplying hot water, and is connected between the hot water supply path and the bathtub. A circulation path having an outgoing pipe and a return pipe and a water level sensor, a circulation pump provided in the circulation path, and a flow switch for detecting circulation of hot and cold water in the circulation path. At the time of hot water filling, the hot water supply amount obtained by subtracting the predetermined hot water supply amount from the initial hot water supply water amount is supplied by the hot water supply means, the circulation pump is operated, circulation is confirmed by the flow switch, and then the predetermined hot water supply amount is supplied by the hot water supply means. And the circulation pump is operated, the circulation is confirmed by the flow switch, and the water level at which the circulation is confirmed at least twice continuously is set as the reference water level.

Then, at the time of the first hot water filling, hot water is supplied by subtracting a predetermined hot water supply amount from the first hot water filling water amount, and a circulation pump is operated to check circulation by a flow switch. Supply the hot water and operate the circulation pump to check the circulation with the flow switch. The water level at which the circulation is confirmed at least twice consecutively is set as the reference water level, so that the water level is higher than the connection position of the circulation path to the bathtub. In this case, the water level sensor provided in the circulation path can accurately detect the water level, and the reference water level can be accurately obtained.

According to a seventh aspect of the present invention, in the hot water supply apparatus for a bathtub according to the sixth aspect, when the control section determines that circulation is not confirmed by the flow switch when the circulation pump is operated, Hot water is supplied by a predetermined hot water supply amount until circulation is continuously confirmed, and a water level when circulation is confirmed at least twice continuously is set as a reference water level.

If the circulation is not confirmed by the flow switch when the circulating pump is operated, the hot water is supplied at a predetermined hot water supply amount at least twice continuously until the circulation is confirmed. In order to use the water level when circulation is confirmed as the reference water level, for example, even when the initial hot water supply is small relative to the size of the bathtub and the connection position of the circulation path to the bathtub, the water level should be higher than the connection position of the circulation path. The position is ensured, and the water level when the circulation is confirmed at least twice consecutively is set as the reference water level, so that it is surely confirmed that there is a water level above the connection position of the circulation path, and based on the reference water level It is possible to set the optimum set water level.

According to an eighth aspect of the present invention, in the hot water supply apparatus for a bathtub according to any one of the fifth to seventh aspects, the hot water supply means switches a flow path between a hot water supply path, an outgoing pipe, and a return pipe. When the hot water is supplied at a set water level with data at the next hot water filling, the control unit includes two pipes of a circulation pipe and a return pipe in the hot water supply path. And hot water is supplied through these two pipes.

When the hot water is supplied at the set water level with data at the next hot water filling, the two pipes of the outgoing pipe and the return pipe of the circulation path are communicated with the hot water supply path by the flow path switching means. Since hot water is supplied through the pipe, the filling time is reduced.

According to a ninth aspect of the present invention, there is provided a hot water supply apparatus for a bathtub according to any one of the first to eighth aspects, wherein the water supply apparatus has a plurality of water level scales corresponding to a plurality of set water levels. While displaying the water level scale,
At the next hot filling, a display unit is provided for displaying only one water level scale of the set water level.

The display section has a plurality of water level scales corresponding to the plurality of set water levels, and displays all the water level scales at the time of the first filling, and one of the set water levels at the next filling. Because only the display state is set,
One display unit can display whether it is the first hot water filling or the next hot water filling.

According to a tenth aspect of the present invention, there is provided a hot water supply apparatus for a bathtub according to any one of the first to ninth aspects.
The control unit has a temperature sensor for detecting a temperature of hot water in the bathtub, and when the water level sensor detects that the water level in the bathtub falls below a set water level, the control unit detects the hot water in the bathtub by the temperature sensor. Has a function of an automatic adding hot water in which hot water is supplied by the hot water supply means within a range from the set temperature to a temperature higher than the set temperature by a predetermined temperature according to the temperature.

When the water level sensor detects that the water level in the bathtub has dropped below the set water level by the function of the automatic hot water supply, the temperature sensor changes the temperature from the set temperature according to the temperature of the hot water in the bathtub detected by the temperature sensor. Since hot water within a temperature range higher than the set temperature by a predetermined temperature is supplied by the hot water supply means, the temperature of the hot water for automatically adding the water level and the hot water temperature in the bathtub while compensating for the lowering of the water level and simultaneously compensating for the lowering of the hot water temperature. Regulated to an appropriate range.

According to an eleventh aspect of the present invention, in the hot water supply apparatus for a bathtub according to any one of the first to tenth aspects, an electric water heater for heating and supplying hot water as hot water supply means and controlling the electric water heater are provided. An electric water heater control unit, and an electric water heater display unit for displaying the electric water heater and turning off the display when unnecessary, and displaying that the electric water heater control unit has been reset when the electric water heater control unit is reset regardless of these display states. It is provided with.

The electric water heater display section displays the electric water heater and turns off the display when unnecessary.
Regardless of these display states, when the electric water heater control unit is reset, the fact that the reset has been performed is displayed, so that the reset can be confirmed without fail even when the display is turned off.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a hot water supply device for a bathtub, in which a bathtub 11 is provided in an indoor bathroom or the like, and an electric water heater 12 as a hot water supply source and a hot water unit 13 are provided outdoors or the like. I have.

The electric water heater 12 employs a water-supply hot-water supply system of a push-up type, and a heater 22 is provided on the bottom side in the hot water storage tank 21.
A piping section 23a of a water supply pipe 23 that is directly connected to a water supply pipe on the water supply side is connected to a lower part of the hot water storage tank 21, and a hot water unit 13 and a shower or hot water supply in a bathroom are connected to an upper part of the hot water storage tank 21. A hot water supply pipe 24 is connected to each hot water supply location such as a mixer tap, a kitchen tap mixer, and a wash tap mixer. At a plurality of locations in the vertical direction of the hot water storage tank 21, a plurality of temperature detection sensors 25 for detecting the remaining hot water amount, hot water temperature, water supply temperature, and the like are provided.

In the push-up type electric water heater 12,
The hot water in the hot water storage tank 21 is heated to a set temperature by the heater 22, and the hot water is pushed up by the water pressure supplied to the lower portion of the hot water storage tank 21 when hot water is supplied from each hot water supply place, and is supplied through the hot water supply pipe 24. The upper hot water layer and the lower room temperature water layer in the hot water storage tank 21 are separated via a hot water mixture layer, and the mixed layer rises with the use of hot water.

The hot water filling unit 13 has an electric mixing valve 31 driven by a motor 31a. The mixing valve 31 has a pipe portion 23b of a water supply pipe 23 and a hot water supply pipe 24.
And are connected respectively. The mixing valve 31 mixes the water from the water supply pipe 23 with the hot water from the electric water heater 12, and adjusts the temperature of the hot water to the set temperature by the mixing ratio of the water and the hot water.

An upper part of a hopper 33 is connected to a pipe 32 to which hot and cold water is supplied from a mixing valve 31.
This hopper 33 separates the water supply pipe 23 side and the hot water supply pipe 24 side from the bathtub 11 side when the water supply pressure is reduced due to water cutoff or the like, and is installed at a position higher than the bathtub 11 and is provided at a lower side of the hopper 33. A pipe 34 for flowing hot and cold water is connected. In the hopper 33, a hot water supply solenoid valve 35 (shown in FIG. 3) as a hot water supply electric valve that opens and closes a flow path of hot water from the pipe 32 to the pipe 34 is provided.

A pipe 34 from the hopper 33 is provided with a flow sensor 36 for detecting the amount of hot water flowing through the pipe 34. Then, mixing valve 31, pipe 32, hopper 33, pipe 34
A hot water supply path 37 is configured by the flow rate sensor 36 and the like.

A motor 38 is connected to the tip of the pipe 34 from the hopper 33.
It is connected to the circulation path 39 via an electric three-way valve 38 as an electric passage switching means using a as a driving source. Circuit 39
Has an outgoing pipe 40 and a return pipe 41, one end of each of the outgoing pipe 40 and the return pipe 41 is integrally connected to a circulation fitting 42 installed in the bathtub 11, and the other end is connected to an electric three-way valve 38. ing. The electric three-way valve 38 switches the flow path between the outgoing pipe 40 and the return pipe 41 of the hot water supply path 37 and the circulation path 39.

The outgoing pipe 40 of the circulation path 39 has an electric three-way valve 38.
A circulating pump 43 that goes to the bathtub 11 from the side and forcibly sends hot water in the pipe 40 to forcibly circulate hot water in the circulation path 39,
A flow switch 44 for detecting the flow of hot and cold water in the circulation path 39,
A bath thermistor 45 as a temperature sensor for detecting the temperature of hot water in the circulation path 39, and a heat insulation heater 46 for heating and maintaining the hot water flowing in the circulation path 39 are provided. Return pipe 41 has
A water level sensor 47 including a pressure sensor for detecting a water level in the bathtub 11 is provided.

Then, the electric water heater 12, the hot water supply path 37, the circulation pipe 39 having the outgoing pipe 40 and the return pipe 41, etc.
Hot water supply means 48 for supplying hot water to 11 is configured.

Next, FIG. 2 shows a remote controller 51 which is installed on a wall surface of a bathroom and operates the hot water filling unit 13.

The remote controller 51 includes a remote controller main body 52, a display section 53 provided on the surface of the remote controller main body 52, and an operation section 5.
4. It has an operation unit 55 that is opened and closed by a lid (not shown).

As the display unit 53, for example, a liquid crystal display is used. FIG. 2 shows a state in which all display locations are simultaneously displayed, a display unit 56a for displaying the current time, a display unit 56b for displaying the hot water supply temperature, A display unit 56c for displaying an image of the bathtub 11,
A display section 56 for displaying the filling temperature inside the display section 56c.
d, a display section 56e for displaying the set water level inside the display section 56c,
During the hot water supply to the bathtub 11 or during circulation, the display section 56f that displays an arrow toward the display section 56c, the display section 56g that indicates the priority of the remote controller 51, the display section 56h that indicates that the hot water is being supplied, and the display that the temperature is being kept warm The display unit 56i includes a display unit 56i.

The display section 56e for displaying the set water level has a plurality of water level scales 57 corresponding to the plurality of set water levels. At the first filling, all the water scales 57 are displayed, and at the next filling, Only one water level scale 57 of the set water level is displayed.

The operation unit 54 includes a high-temperature hot water button 58a for specifying a high-temperature hot water of, for example, about 60 ° C., a talk button 58b for specifying a call with a main remote controller (not shown), and setting and canceling of setting of automatic hot water filling. It has a bathing button 58c. Each of the high-temperature hot water button 58a, the story button 58b and the bath button 58c has a light emitting portion 59 for displaying an ON state.
Are arranged.

The operation unit 55 includes a hot water supply temperature button 60a for specifying the hot water supply temperature adjustment setting, a hot water temperature button 60b for specifying the hot water temperature adjustment setting, and a hot water amount button 6 for specifying the hot water supply adjustment setting.
0c, these hot water temperature button 60a, hot water temperature button 60b and hot water quantity button
An adjustment setting button 60d for adjusting and setting when any of 60c is operated, a priority button 60e for specifying priority of the remote controller 51, a volume button 60f for adjusting and setting the volume, a hot water button 60g for specifying hot water, It has a watering button 60h for specifying water and a cleaning button 60i for specifying cleaning.

The remote controller 51 has a built-in microphone and speaker, and also has a built-in microcomputer having a function of display control means for controlling the display on the display unit 53.

Next, FIG. 3 shows a block diagram of the hot water filling unit 13. Reference numeral 71 denotes a control circuit.
And a CPU 73 and a RO as a control unit.
M74 and a RAM 75 as storage means.

A commercial power supply is connected to the board 72 via a leakage breaker 76, a power transformer 77 for converting the commercial power supply to a control power supply is connected, and connected to the leakage breaker 76 via a limiter 78. A switch 79 arranged in series with the limiter 78 and the heat retaining heater 46 is connected to the circulation pump 43 and the leakage breaker 76. The leakage breaker 76 is connected to a freeze prevention heater 80 installed in the hot water filling unit 13 and a freeze prevention thermo 81 that energizes the freeze prevention heater 80 when the temperature falls below a set temperature.

A mixing valve 31, a hot water supply solenoid valve 35, an electric three-way valve 38, and a remote controller 51 are connected to the substrate 72, and a flow rate sensor 36, a flow switch 44, a bath thermistor 45, and a water level sensor 47 are connected to the board 72. I have.

The detection value of the water level sensor 47 is A / D converted and input to the CPU 73. The CPU 73 uses the detection value of the water level sensor 47 corresponding to a certain level difference in water level change, ie, pressure change as one unit. That is, it can be read as +1 point or -1 point.

The CPU 73 has the following functions.

At the time of the first filling of the bathtub 11, a predetermined amount of the first filling water is supplied by the hot water supply means 48, and a plurality of set water levels are set with the water level detected by the water level sensor 47 at this time as a reference water level. In addition to the setting, a plurality of set water levels and corresponding hot water supply amounts, that is, data for hot water are stored in the RAM 75, and the next time the hot water is filled in the bathtub 11, the setting specified based on the hot water data stored in the RAM 75 A function to supply hot water by the hot water supply means 48 for the amount of hot water at the water level.

After the filling is completed, the set water level above the filled water level is designated, so that the hot water supply means 48 supplies hot water to the set water level designated based on the filling data stored in the RAM 75. function.

At the next hot filling, if there is hot water supply data of the designated set water level based on the hot water data stored in the RAM 75, the hot water supply means 48 is used.
If there is no data, the hot water is supplied by the hot water supply means 48 at the set water level with the hot water data at the set water level lower than the specified set water level, and then the water level sensor 47 checks the water level Hot water supply means 48 up to the set water level specified
And a function of storing in the RAM 75 the amount of hot water at the set water level at this time.

At the time of the first hot water filling, hot water is supplied to the set water level one level higher than the reference water level by the hot water supply means 48, and the hot water supply amount at this time is stored in the RAM 75 as a temporary hot water supply amount for one set water level. Sometimes, when there is no data of the hot water supply amount of the specified set water level and the data of the hot water supply amount of the set water level below this set water level, the setting with the hot water supply amount data at the set water level above the specified set water level Hot water supply means 48 subtracts the provisional hot water supply amount corresponding to the water level difference from the water level
After the hot water is supplied, the circulation pump 43 is operated, the circulation is confirmed by the flow switch 44, and the hot water is supplied by the hot water supply means 48 to the specified set water level while checking the water level with the water level sensor 47,
A function of storing the hot water supply amount at the set water level at this time in the RAM 75.

At the time of the first hot water filling, a hot water supply amount obtained by subtracting a predetermined hot water supply amount from the first hot water supply water amount is supplied by the hot water supply means 48, and the circulation pump 43 is operated to activate the flow switch.
The circulation is confirmed by 44, and a predetermined amount of hot water is continuously supplied by the hot water supply means 48, and the circulation pump 43 is operated to confirm the circulation by the flow switch 44, and the water level at which the circulation is confirmed at least twice continuously is checked. Function to set the reference water level. When the circulation is not confirmed by the flow switch 44 when the circulation pump 43 is operated, the hot water is supplied by a predetermined hot water supply amount until the circulation is confirmed at least twice continuously, and the circulation is continuously performed at least twice. A function to set the water level at the time of confirmation to the reference water level.

When the hot water is supplied at the set water level with data at the next hot water filling, the electric three-way valve 38 connects the hot water supply path 37 to two pipes, the outgoing pipe 40 and the return pipe 41 of the circulation path 39. Function to supply hot water through these two pipes.

When the water level sensor 47 detects that the water level in the bathtub 11 has fallen below the set water level, the bath thermistor 45 determines a predetermined temperature from the set temperature according to the temperature of the hot or cold water in the bathtub 11. A function of an automatic adding hot water in which hot water is supplied by the hot water supply means 48 within a range of a high temperature, for example, a temperature within a range from a set temperature to a temperature of hot water. The function of the automatic hot water supply is arbitrarily switched between hot water within a range of a temperature higher than the set temperature by a predetermined temperature or hot water at the set temperature by performing a special operation with the remote controller 51 or the like. be able to.

Next, the operation of the bathtub hot water supply device will be described.

The electric water heater 12 raises the room temperature water supplied to the hot water storage tank 21 and the hot water not used as the remaining hot water to the set temperature in a specific time zone such as the midnight power time zone.

The filling of the bathtub 11 will be described with reference to the flowchart of FIG. When the bath button 58c of the remote controller 51 is turned on (step 1), the RAM 75 has hot water filling data indicating the correspondence between the set water level and the hot water supply amount, that is, after the hot water supply device for the bathtub is installed or the control circuit 71 is reset. It is determined whether or not it is the first-time hot water filling (step 2).

If there is no data for filling, and if it is the first filling, the first filling operation is executed under the control of the CPU 73 (step 3). If so, the next filling operation under the control of the CPU 73 is executed (step 4).

Next, the first filling will be described with reference to the flowcharts of FIGS. In the first hot water filling, hot water filling data such as a correspondence relationship between a specific set water level corresponding to the size and shape of the bathtub 11 and a hot water supply amount is collected.

The first-time filling operation is started by setting the first-time hot water supply amount with the remote controller 51 and turning on the bath button 58c. At this time, on the display unit 53 of the remote control 51,
In the display unit 56e for displaying the water level, all the water level scales 57 are obtained until the data for hot water filling is obtained by the first hot water filling.
Blinks to indicate that there is no storage of the filling data and that the first filling is being performed. In the display section 56d for displaying the hot water temperature, the first hot water supply amount or the set temperature is displayed until the hot water data is obtained by the first hot water filling.

When the first filling operation is started, a process of filling the outgoing pipe 40 of the circulation path 39 with hot water and making the circulation pump 43 start priming is started. That is, the hot water supply path 37 is controlled by the electric three-way valve 38.
To the flow path connecting the outgoing pipe 40 (Step 1
1) The mixing valve 31 is adjusted to the set temperature set by the remote controller 51, and the hot water supply electromagnetic valve 35 is opened (step 12).
Thereby, the hot and cold water adjusted to the set temperature by the mixing valve 31 is supplied from the hot water supply path 37 to one of the outgoing pipes 40 and is filled in the outgoing pipe 40, so that the circulation pump 43 is primed. At this time, by supplying hot water to one pipe of the outgoing pipe 40, the pressure of the hot water flowing in the outgoing pipe 40 is increased and the flow rate is increased, so that the air in the outgoing pipe 40 can be reliably vented.

The amount of hot water supplied is monitored by the flow rate sensor 36, and when it reaches a predetermined amount, for example, 1 liter (step 1).
3) The electric three-way valve 38 switches to a flow path connecting the hot water supply path 37 and the return pipe 41 (step 14). Thereby, the hot and cold water adjusted to the set temperature by the mixing valve 31 is supplied to the hot water supply path 37.
Then, hot water is supplied through one pipe of the return pipe 41 and the inside of the return pipe 41 is filled. At this time, by supplying hot water through one pipe of the return pipe 41, the pressure of the hot water flowing in the return pipe 41 is increased and the flow rate is increased, so that the air in the return pipe 41 can be reliably vented.

The amount of hot water supplied is monitored by the flow sensor 36, and when the amount reaches a predetermined amount, for example, 3 liters (step 1).
5), close the hot water supply solenoid valve 35 (step 16).

Subsequently, a process for confirming the presence or absence of remaining hot water in the bathtub 11 is started. That is, the electric three-way valve 38
Then, the circulation pump 43 is driven (step 17), and the CPU 73 starts a circulation confirmation timer for 2 minutes by the function of the CPU 73. As a result, the hot and cold water in the circulation path 39 is circulated, and if there is no remaining hot water in the bathtub 11, the circulation stops, and if there is remaining hot water, the circulation is continued.

If there is no remaining hot water in the bathtub 11, the hot water in the circulation path 39 circulates immediately after the circulation starts, and the flow switch 44 is turned on (step 18).
The flow switch 44 is turned off before the flow goes to 11 and the 2-minute circulation confirmation timer expires (step 19). Thus, it is determined that there is no remaining hot water, and the circulation pump 43 is stopped (step 20).

If there is residual hot water in the bathtub 11, the circulation of hot water continues between the circulation path 39 and the bathtub 11 and the flow switch 44
The 2-minute circulation confirmation timer times out without turning off the water (step 19), and finishes the hot water filling (step 19).
twenty one). In this case, the temperature of the hot and cold water in the bathtub 11 circulated in the circulation path 39 is measured by the bath thermistor 45, and it is confirmed whether the measured hot water temperature is within, for example, −10 ° C. of the set temperature set by the remote controller 51 (step 22) If there is a temperature difference of −10 ° C. or more, an error is displayed on the display unit 53 of the remote controller 51 (step 23). On the other hand, within -10 ° C, RAM
Since there is no data for hot water filling in 75 (step 24), the operation shifts to the warming operation (step 25). Steps 11 to 26 are common to the first filling and the next filling. Therefore, in the next filling, there is data for filling. The automatic hot water operation for supplying water to the water level is performed (step 26).

Subsequently, in step 18, it is confirmed that there is no remaining hot water in the bathtub 11, and in step 20, the circulation pump 43 is turned off, and then a process of supplying hot water for the first hot water supply amount is started. The first hot water supply amount is set in advance and can be changed and set by the remote controller 51 according to the size of the bathtub 11 and the like, and is set to, for example, 200 liters.

As shown in FIG. 6, a hot water supply path is provided by an electric three-way valve 38.
The flow path for simultaneously connecting the 37 and the two pipes, the outgoing pipe 40 and the return pipe 41, is switched (step 27), and the hot water supply electromagnetic valve 35 is opened (step 28). As a result, the hot and cold water adjusted to the set temperature by the mixing valve 31 is supplied to the bathtub 11 from the hot water supply passage 37 through the two pipes, the outgoing pipe 40 and the return pipe 41.

The hot water supply amount is monitored by the flow rate sensor 36, and when the hot water supply amount is obtained by subtracting, for example, 20 liters as a predetermined hot water supply amount from the initial hot water supply amount (step 2).
9), close the hot water supply solenoid valve 35 (step 30).

The electric three-way valve 38 switches the circulation flow path connecting the going pipe 40 and the return pipe 41 (step 31), drives the circulation pump 43 (step 32), and confirms the circulation for, for example, 2 minutes by the function of the CPU 73. Start the timer. If the level of the hot water supplied to the bathtub 11 is higher than the circulation fitting 42, the circulation of the hot water can be detected by turning on the flow switch 44 (step 33), and the water level of the hot water supplied to the bathtub 11 is determined by the circulation fitting. If it is below 42, the circulation of hot and cold water stops, and the 2-minute circulation confirmation timer times out while the flow switch 44 remains off (step 34). When the flow switch 44 is in the ON state or the time is up while the flow switch 44 is in the OFF state, the circulation pump 43 is stopped (step
35).

The electric three-way valve 38 switches to a flow path connecting the hot water supply path 37 and the return pipe 41 (step 36).
Is opened (step 37). This allows the mixing valve
Return the hot and cold water adjusted to the set temperature in 31 from the hot water supply channel 37 and pipe
Hot water is supplied to bathtub 11 through one tube of 41. At this time,
Hot water may be supplied through two pipes, the outgoing pipe 40 and the return pipe 41.

The hot water supply amount is monitored by the flow rate sensor 36, and when a predetermined hot water supply amount of, for example, 20 liters is deducted from the initial hot water supply amount, for example, 20 liters of hot water is supplied, that is, when the first hot water supply amount is supplied (step 38), the hot water supply solenoid valve 35 is closed (step 39).

The electric three-way valve 38 switches to the circulation flow path connecting the going pipe 40 and the return pipe 41, drives the circulation pump 43 (step 40), and starts a 2-minute circulation confirmation timer by the function of the CPU 73. . If the level of the hot water supplied to the bathtub 11 is higher than the circulation fitting 42, the circulation of the hot water can be detected by turning on the flow switch 44 (step 41).
If the level of the hot water supplied to the bathtub 11 is lower than the circulation fitting 42, the hot water does not circulate, and the 2-minute circulation confirmation timer times out while the flow switch 44 remains off (step 42).

Even if the flow switch 44 is turned on in the current circulation, if the flow switch 44 was turned off in the previous circulation (step 43), or if the flow switch 44 is turned off in the current circulation, If it is up,
Proceeding to step 53, a hot water filling process is performed in which the initial hot water supply amount is additionally supplied by a predetermined amount.

When it is confirmed that the flow switch 44 is turned on in both the previous circulation and the current circulation, the level of the hot water supplied to the bathtub 11 can be reliably confirmed to be above the circulation fitting 42, and the circulation pump 43 is operated. Stop (step 44).

Subsequently, the flow switch 44 is used for both circulations.
Is turned on and the circulation pump 43 is stopped, and then the water level detected by the water level sensor 47 at this time, i.e., the pressure, is set as the reference water level P0, and the other set water levels are equally spaced with respect to the reference water level P0. Distribute to. For example, as shown in Table 1, the set water level is from level 1 to 7, the intermediate level 3 is set to the reference water level P0, and the target pressure of each level is set to level 2
Is P0-4A / D, level 1 is P0-8A / D, level 4 is P0 + 4A / D
D, level 5 is set to P0 + 8A / D, level 6 is set to P0 + 12A / D, and level 7 is set to P0 + 16A / D. Note that the target pressure is ± 4 A / D
Is set according to the minimum unit or design in which the water level change of the water level sensor 47, that is, the pressure change can be detected. Table 1 also shows changes in the bathtub water level at each level based on level 3 and the amount of hot water supply.

[0082]

[Table 1]

Then, as shown in FIG. 7, the reference water level P0 as the level 3 of the set water level and the hot water supply amount L0 which is the initial hot water filling amount required to achieve the reference water level P0,
The filling data is stored in the RAM 75, such as each level of the set water level distributed with reference to the reference water level P0 (step 45).

Thereafter, hot water is supplied to level 4 which is one level higher than level 3 of the set water level which is the reference water level P0. That is, the electric three-way valve 38 switches to the flow path connecting the hot water supply path 37 and the outgoing pipe 40 (step 46), and opens the hot water supply electromagnetic valve 35 (step 47). As a result, the bathtub is
While monitoring a change in the water level, that is, a change in the pressure in the water 11, the hot water adjusted to the set temperature by the mixing valve 31 is supplied from the hot water supply passage 37 to the bathtub 11 through one pipe 40.

When the pressure detected by the water level sensor 47 reaches P0 + 4 A / D, which is the target pressure of level 4 of the set water level (step 48), the hot water supply electromagnetic valve 35 is closed (step 49).

At this time, the hot water supply amount L1 required to achieve the set water level 4 is stored in the RAM 75 corresponding to the set water level 4 (step 50). Further, the hot water supply amount, which is the difference between the hot water supply amount L0 corresponding to the set water level level 3, which is the reference water level P0, and the hot water supply amount L1, corresponding to the set water level level 4, is set as one for the set water level below the reference water level P0. The temporary hot water supply amount Lx for the level is stored in the RAM 75 (step 5
0).

In the display unit 53 of the remote controller 51, all the water level scales 57 are blinked and displayed on the display unit 56e for displaying the water level until the data for the filling is obtained by the first filling. Notifies that no data is stored and that the first hot water is being filled. Then, when the data for hot water filling is obtained by the first hot water filling, only the fourth level 4 water level scale 57 from the bottom of the water level scale 57 is lit or blinked, and the other level water level scales are turned off ( Step 51).

Further, a display section 56d for displaying the hot water temperature.
In, until the data for the hot water is obtained by the first hot water, the first hot water supply amount is displayed, and
When the filling data is obtained by the first filling, the filling temperature is displayed (step 52). Thus, a series of first hot water filling is completed.

Further, when hot water is supplied for the first hot water supply amount, it is detected at least once that the level of hot water supplied to the bathtub 11 is below the circulation fitting 42, and the flow switch 44 is turned on in step 42. If the time is up in the off state, or if the flow switch 44 has not been turned on for the first time in step 43, the process proceeds to step 53 as shown in FIG. Add hot water for each minute and apply hot water.

That is, the hot water supply electromagnetic valve 35 is opened (step
53) While monitoring the amount of hot water supplied by the flow sensor 36, the hot water adjusted to the set temperature by the mixing valve 31 is supplied to the hot water supply path.
Hot water is supplied from the 37 to the bathtub 11 through one pipe of the return pipe 41, and when a predetermined amount of hot water, for example, 20 liters is supplied (step 54), the hot water supply electromagnetic valve 35 is closed (step 55).

The electric three-way valve 38 switches to the circulation flow path connecting the going pipe 40 and the return pipe 41, drives the circulation pump 43 (step 56), and starts a 2-minute circulation confirmation timer by the function of the CPU 73. . If the level of the hot water supplied to the bathtub 11 is above the circulation fitting 42, the circulation of the hot water can be detected by turning on the flow switch 44 (step 57).
If the level of the hot water supplied to the bathtub 11 is lower than the circulation fitting 42, the hot water does not circulate, and the 2-minute circulation confirmation timer times out while the flow switch 44 remains off (step 58). When the time is up while the flow switch 44 is on or the flow switch 44 is off, the circulation pump 43 is stopped (step 59).

Even if the flow switch 44 is turned on in the current circulation, if the flow switch 44 is off in the previous circulation (step 60), or if the flow switch 44 is turned off in the current circulation, If it is up,
Returning to step 53, again, as the predetermined hot water supply amount, for example, 2
The flow of supplying 0 liter of hot water and circulating is repeated.

When the ON of the flow switch 44 is confirmed twice consecutively, the water level detected by the water level sensor 47 at this time, that is, the pressure, is set to the minimum water level P0, and a plurality of other set water levels are set based on the minimum water level P0. Are distributed at equal intervals. For example, as shown in Table 2, the set water level is from level 1 to 7, the lowest level 1 is the lowest water level P0, the target pressure of each level, level 2 is P0 + 4A / D, level 3 is P0 + 8A / D, Level 4 is P0 + 12A / D, Level 5 is P0 + 16A / D, Level 6 is
Set P0 + 20A / D and level 7 to P0 + 24A / D. Note that the target pressure of +4 A / D is set according to the minimum unit for detecting the water level change of the water level sensor 47, that is, the pressure change, or by design. Table 2 also shows changes in bathtub water level at each level based on level 1 and hot water supply.

[0094]

[Table 2]

Then, the minimum water level P0 as the level 1 of the set water level, the amount of hot water supply L0 required to achieve this minimum water level P0, and the levels of the set water level distributed with reference to the minimum water level P0, etc. The extension data is stored in the RAM 75 (step 61).

Thereafter, hot water is supplied to level 2 which is one level higher than level 1 of the set water level which is the minimum water level P0. That is, the electric three-way valve 38 switches the flow path to connect the hot water supply path 37 and the outgoing pipe 40 (step 62), and opens the hot water supply electromagnetic valve 35 (step 63). As a result, the bathtub is
While monitoring a change in the water level, that is, a change in the pressure in the water 11, the hot water adjusted to the set temperature by the mixing valve 31 is supplied from the hot water supply passage 37 to the bathtub 11 through one pipe 40.

When the pressure detected by the water level sensor 47 reaches P0 + 4 A / D which is the target pressure of the set water level at level 2 (step 64), the hot water supply electromagnetic valve 35 is closed (step 65).

At this time, the hot water supply amount L1 required to achieve the set water level 2 is stored in the RAM 75 corresponding to the set water level 2 (step 66).

As described above, when the hot water supply amount is set in the first hot water filling, the first hot water filling can be completed normally even if the hot water supply amount is set to be obviously small. In other words, if you do not know the amount of hot water to supply in the first hot water, you can set the minimum hot water supply and you can normally fill the hot water. it can.

In the display unit 53 of the remote controller 51, all the water level scales 57 are blinked and displayed on the display unit 56e for displaying the water level until the data for the filling is obtained by the first filling. Notifies that no data is stored and that the first hot water is being filled. Then, when the data for hot water filling is obtained by the first hot water filling, only the water level scale 57 of the second level 2 from the bottom of the water level scale 57 is lit or blinked, and the water level scales of the other levels are turned off ( Step 67).

Further, a display section 56d for displaying the filling temperature is provided.
In, until the data for the hot water is obtained by the first hot water, the first hot water supply amount is displayed, and
When the filling data is obtained by the first filling, the filling temperature is displayed (step 68). Thus, a series of first hot water filling is completed.

Next, the next filling operation will be described with reference to the flow charts of FIGS. 9 and 10. Remote control 51
In the display section 56e which displays the water level of the above, the desired water level is designated by moving the lit water level scale 57 up and down and the bath button 58c is turned on to start the next filling operation.

First, the processing from step 11 to step 26 described for the first hot water filling is executed. By this processing, the outgoing pipe 40 of the circulation path 39 is filled with hot water and the circulation pump
The process of priming 43, the process of filling hot water in the return pipe 41 of the circulation path 39, and the process of checking whether there is remaining hot water in the bathtub 11 are sequentially executed.

Then, it is confirmed whether or not the data of the hot water supply amount corresponding to the set water level exists in the RAM 75 (step 71).

When the data of the hot water supply amount corresponding to the designated set water level is in the RAM 75, the electric three-way valve 38 controls the hot water supply path.
The flow path for simultaneously connecting the 37 and the two pipes, the outgoing pipe 40 and the return pipe 41, is switched (step 72), and the hot water supply electromagnetic valve 35 is opened (step 73). As a result, the hot and cold water adjusted to the set temperature by the mixing valve 31 is supplied to the bathtub 11 from the hot water supply passage 37 through the two pipes, the outgoing pipe 40 and the return pipe 41.

The hot water supply amount is monitored by the flow rate sensor 36. When the hot water supply amount corresponding to the designated set water level is supplied (step 74), the hot water supply electromagnetic valve 35 is closed (step 75).

Thereafter, it is confirmed whether the hot water supply amount corresponding to the designated set water level has been corrected (step 7).
6) If you have corrected the hot water supply, complete the next hot water filling.

If the hot water supply amount has not been corrected, the electric three-way valve 38 switches to the flow path connecting the hot water supply passage 37 and the outgoing pipe 40 (step 77). The water level, that is, the pressure is detected. At this time,
After the pump circulation is performed to confirm once that the water level of the bathtub 11 is above the circulation fitting 42, the water level pressure may be confirmed.

From the detection by the water level sensor 47, it is confirmed whether or not the target pressure has been reached (step 78). If the target pressure has been reached, the next filling operation is completed.

If the target pressure has not been reached, the hot water supply solenoid valve
35 is opened (step 79), and while the water level sensor 47 of the return pipe 41 monitors the water level change, that is, the pressure change, in the bathtub 11, the hot water adjusted to the set temperature by the mixing valve 31 is supplied to the hot water supply path.
Hot water is supplied to the bathtub 11 through one of the pipes 40 going from 37. When the pressure detected by the water level sensor 47 reaches the target pressure (step 80), the hot water supply electromagnetic valve 35 is closed (step 8).
1).

The amount of hot water to which the additional hot water has been added is used as the data of the amount of hot water corresponding to the designated set water level as RAM data.
Rewritten and stored in 75 (step 82), and the next filling is completed.

If the data of the hot water supply amount corresponding to the set water level specified in step 71 is not stored in the RAM 75, as shown in FIG.
The flow path for simultaneously connecting the 37 and two pipes, the outgoing pipe 40 and the return pipe 41, is switched (step 83), and the hot water supply electromagnetic valve 35 is opened (step 84). As a result, the hot and cold water adjusted to the set temperature by the mixing valve 31 is supplied to the bathtub 11 from the hot water supply passage 37 through the two pipes, the outgoing pipe 40 and the return pipe 41.

At this time, the hot water supply amount at the set water level with the data of the hot water supply amount at the set water level lower than the designated set water level is set as the target hot water supply amount. Alternatively, if there is no data of the hot water supply amount at the specified set water level and data of the hot water supply amount at the set water level lower than the set water level, RA
The target hot water supply amount is set using the provisional hot water supply amount Lx corresponding to one set water level stored in M75. That is,
At the set water level higher than the specified set water level, the target hot water supply is set by subtracting the provisional hot water supply Lx corresponding to the water level difference from the set water level with the hot water supply data. (Step 85).

The hot water supply amount is monitored by the flow rate sensor 36, and when the target hot water supply amount is supplied (step 86), the hot water supply solenoid valve 35
Is closed (step 87).

The electric three-way valve 38 switches to the circulation flow path connecting the going pipe 40 and the return pipe 41 (step 88), drives the circulation pump 43 (step 89), and circulates for 2 minutes, for example (step 90). Turn off circulation pump 43 (step
91). Thus, when the calculated target hot water supply amount is supplied, it can be confirmed whether or not the water level is really higher than the circulation fitting 42.

The electric three-way valve 38 switches to the flow path connecting the hot water supply path 37 and the outgoing pipe 40 (step 92), and the water level sensor 47 in the return pipe 41 detects the water level, that is, the pressure in the bathtub 11, and the designated water level is detected. It is checked whether the set water level has been reached (step 93).

As the target hot water supply amount, the provisional hot water supply amount Lx corresponding to the water level difference from the set water level having the hot water supply data at the set water level higher than the specified set water level
If you set the target amount of hot water after deducting the amount,
By supplying the target amount of hot water, the designated set water level may be reached. In this case, the amount of hot water required to achieve the specified set water level is
It is stored in the RAM 75 (step 94), and the next filling is completed.

As the target hot water supply amount, if the target hot water supply amount is a set water level at a set water level at a set water level lower than the specified set water level, and the target hot water supply amount is set. Since the level has not yet been reached, additional hot water will be supplied. That is, the hot water supply electromagnetic valve 35 is opened (step 95), and while the water level change, that is, the pressure change in the bathtub 11 is monitored by the water level sensor 47 of the return pipe 41, the hot water adjusted to the set temperature by the mixing valve 31 is supplied to the hot water supply path 37. Hot water is supplied to the bathtub 11 through one of the incoming pipes 40.

When the pressure detected by the water level sensor 47 reaches the pressure of the designated set water level (step 96), the hot water supply electromagnetic valve 35 is closed (step 97).

The amount of hot water required to achieve the designated set water level at this time is stored in RAM 75 (step 98), and the next hot water filling is completed.

It is to be noted that, after the completion of the first filling and the completion of the next filling, the set water level above the filled water level is changed and designated, so that the set water level designated based on the data stored in the RAM 75. Hot water. That is,
After the first filling is completed, the set water level is ready to be specified. Therefore, as in steps 46 to 50, the water is filled from the initially set water level to the specified set water level and specified. The hot water supply amount corresponding to the set water level is stored in the RAM 75. Further, after completion of the next filling, as in steps 95 to 98, filling is performed from the level of the set filling level next time to the level of the designated setting water level.

In addition, both after the completion of the first filling and the completion of the next filling, after the filling of the bathtub 11 is completed, a water level sensor is provided.
The water level is monitored at 47 and the bath temperature is monitored at the bath thermistor 45.

When the water level sensor 47 detects that the water level in the bathtub 11 has fallen below the set water level, hot water having a temperature higher than the set temperature and within the temperature of the hot water bath is supplied by the automatic hot water supply function. This makes it possible to compensate for the drop in the water level and at the same time to compensate for the drop in the hot water temperature, and to reduce the chance of the heat retaining operation by the heat retaining heater 46, and to keep the temperature of the hot and cold water to be automatically added to an appropriate range without making it too hot. Can be regulated. In addition, by reducing the water level lowering amount for judging the execution of the automatic hot water supply to a lower water level lower than usual, the opportunity for executing the automatic hot water supply is increased, thereby reducing the chance of the heat retaining operation by the heat retaining heater 46. it can. In addition, when the temperature of the hot water in the bathtub 11 decreases little, for example, immediately after the warming operation, the hot water temperature at the time of automatically adding hot water is set higher than the set temperature and lower within the temperature of the high-temperature hot water so that the hot water temperature can be reduced. Excessive temperature rise can be prevented. In addition, when adding hot water by operating the hot water button 60g, as with automatic hot water, by supplying hot water at a temperature higher than the set temperature and within the temperature of hot water,
A similar effect can be obtained.

When the bath thermistor 45 detects a drop in the hot water temperature, the circulation pump 43 is operated to circulate the hot water in the bathtub 11 in the circulation path 39 by the automatic warming function, and the warming heater 46 is energized and circulated. The temperature of the hot water in the bathtub 11 circulating in the path 39 is raised to a set temperature. At this time, in the warming operation by the warming heater 46, the temperature of the hot water cannot be raised in a short time like a gas water heater, for example. By supplying a predetermined amount of hot and cold water having a temperature within the above range, the hot water temperature can be raised in a short time, comfort can be obtained, and the power supply time to the heat retaining heater 46 can be shortened to save power.

As described above, at the time of the first filling of the bathtub 11, a predetermined amount of the first filling water is supplied, a plurality of set water levels are set with the water level at this time as a reference water level, and a plurality of these water levels are set. By storing the set water level and the corresponding hot water supply amount in the RAM 75, the relationship between a plurality of set water levels and the corresponding hot water supply amount can be accurately obtained without being affected by piping conditions and the like. Sometimes, you can specify the set water level and fill it with water.
Hot water is supplied at the set water level specified based on the data stored in M75, and the water can be accurately filled to the set water level.

When the set water level above the filled water level is designated both after the completion of the first filling and after the completion of the next filling, the designated water level specified based on the data stored in the RAM 75 is obtained. Because the hot water can be supplied, the water level can be changed after completion of filling.

When the hot water is supplied next time, if there is data of the hot water supply amount of the designated set water level based on the data stored in the RAM 75, the hot water supply amount is supplied. After supplying the amount of hot water at the set water level with the data of the hot water supply at the set water level below the specified set water level, the water is supplied to the specified set water level while checking the water level, and then the hot water supply amount at the set water level at this time Is stored in the RAM 75, so that the water can be accurately filled even at the set water level where there is no data on the amount of hot water supply, and the data can be taken out at the same time and used for the next filling.

Further, at the time of the first hot water filling, hot water is supplied to the set water level immediately above the reference water level, and the amount of hot water supplied at this time is stored in the RAM 75 as a temporary hot water supply amount for one set water level. When there is no data of the hot water supply amount of the specified set water level and the data of the hot water supply amount of the set water level below this set water level, the set water level with the hot water supply data at the set water level above the specified set water level After the hot water supply amount obtained by subtracting the provisional hot water supply amount corresponding to the water level difference is supplied, the hot water is supplied to the specified water level while checking the water level, and the hot water supply amount at the set water level at this time is stored in the RAM 75. Water can be accurately filled even at the set water level where there is no data on the amount.
Data can be collected at the same time and used at the next hot water filling.

At the time of the next hot water filling, after the hot water supply amount obtained by subtracting the temporary hot water supply amount corresponding to the water level difference from the set water level having the hot water supply data at the set water level higher than the specified set water level, Activate the circulation pump 43 and check the circulation with the flow switch 44, so if the confirmation of the circulation is obtained,
There is a water level above the connection position of the circulation path 39 to the bathtub 11, and it can be understood that the water level can be accurately detected by the water level sensor 47 provided in the circulation path 39. Hot water can be supplied.

Further, at the time of the first hot water filling, the hot water supply amount obtained by subtracting the predetermined hot water supply amount from the first hot water supply water amount is supplied, the circulation pump 43 is operated, and the circulation is confirmed by the flow switch 44. The amount of hot water supplied and the circulation pump 43 operated to check the circulation with the flow switch 44, and the connection position of the circulation path 39 with respect to the bathtub 11 in order to set the water level at which the circulation is confirmed at least twice consecutively to the reference water level. The water level is surely higher, and the water level can be accurately detected by the water level sensor 47 provided in the circulation path 39, and the reference water level can be accurately obtained.

Further, if the circulation is not confirmed by the flow switch 44 when the circulation pump 43 is operated, the hot water is supplied at a predetermined hot water supply amount at least twice continuously until the circulation is confirmed. In order to set the water level when circulation is confirmed to be the reference water level including the minimum water level, for example, even if the initial hot water supply amount is small relative to the size of the bathtub 11 and the connection position of the circulation path 39 to the bathtub 11, the circulation The water level can be reliably positioned above the connection position of the path 39, and the water level when circulation is confirmed at least twice consecutively is set as the reference water level, so that the water level is higher than the circulation fitting 42 of the bathtub 11. Can be confirmed with certainty, and the optimum set water level can be set based on the reference water level.

When the hot water is supplied at the set water level with data at the next hot water filling, the electric three-way valve 38 controls the hot water supply path.
Since two pipes, an outgoing pipe 40 and a return pipe 41, of the circulation path 39 are communicated with 37 and hot water is supplied through these two pipes, the filling time can be reduced.

Further, the display unit 53 of the remote controller 51 has a plurality of water level scales 57 corresponding to a plurality of set water levels.
At the time of the next hot filling, only one water level scale 57 of the set water level is displayed, so that it is possible to distinguish and display the first hot filling or the next hot filling on one display section 53.

When the water level sensor 47 detects that the water level in the bathtub 11 has fallen below the set water level by the function of the automatic hot water supply, the temperature of the hot water in the bathtub 11 is detected by the bath thermistor 45. The hot water is supplied by the hot water supply means 48 within a range of a predetermined temperature higher than the set temperature from the set temperature by a predetermined temperature higher than the set temperature, for example, the hot water is supplied from the set temperature. In addition to supplementing the temperature, the temperature of the hot and cold water to be added can be restricted to an appropriate range.

As shown in FIG. 11A, the electric water heater 12 is provided with an electric water heater control unit 91 for controlling boiling.
have. The electric water heater control unit 91 includes a control board on which a microcomputer is mounted and an electric water heater.
It has an electric water heater display section 92 for displaying the control related to 12. The electric water heater display unit 92 includes a remaining hot water amount display unit that displays the remaining hot water amount, a hot water temperature display unit that displays the hot water temperature, a display unit that displays other setting items, and the like, as shown in FIG. As shown (the figure shows a state in which all display locations are simultaneously displayed), a time display unit 92a for displaying time and the like are provided.

When the electric water heater 12 is used, power is supplied in all time zones, but the time zone setting is different from the power unit price for each time zone. It is set by switching to either. In the case of time zone setting, since the current time is required for boiling control,
The time is always set, and the set time is displayed on the time display unit 92a of the electric water heater display unit 92. In the case of the midnight power setting, the power is automatically turned on and off during the midnight power time zone, so that setting of the current time is not necessary, and the electric water heater display section 92 is turned on during the midnight power time zone when the power is turned on. Since there is no need to display the light, the electric water heater display unit 92 is normally kept in the light-off state, and is displayed when necessary such as setting.

Further, when the electric water heater 12 is to be maintained or malfunctioned, the electric water heater control unit 91
Reset operation of the microcomputer. At this time, the time display unit 92a of the electric water heater display unit 92 resets whether the time is displayed in the case of the time zone setting or in the non-display state in which the power is turned off in the case of the midnight power setting. Displays a reset display indicating that the operation has been performed.

For example, as shown in FIG. 11 (c), when the microcomputer is reset, the time display section 92a displays the four lower half segments of the two digits indicating the hour and the minute. The four segments in the lower half of the two digits are sequentially displayed so as to increase by one segment at intervals of, for example, about 0.5 seconds. When all four segments of the hour and minute are displayed, the hour segment is not displayed, and only the minute segment is displayed, for example, for about 1.0 second. Thereafter, in the case of setting by time zone, a bar indicating that the time is not set is displayed, and in the case of midnight power setting, the display returns to the non-display.

As described above, the electric water heater display section 92 displays the electric water heater 12 and turns off the display when it is unnecessary, and indicates that the electric water heater control unit 91 is reset when the electric water heater control unit 91 is reset regardless of the display state. Since the display is made, it can be surely confirmed that the reset has been performed even when the display has been turned off, that is, the microcomputer has been restarted.

When the electric water heater control unit 91 is turned on without a backup power supply, the display is displayed in the same manner as when the electric water heater control unit 91 is reset, so that there is no backup power supply. Can be displayed.

Further, when hot water is supplied from the high pressure type electric water heater 12, the water hammer phenomenon is likely to occur due to the high pressure. However, even when the water path is changed by the electric three-way valve 38, the hot water supply electromagnetic valve 35 is turned on. By changing the waterway as it is, water hammer can be reduced. Also, even when the hot water supply electromagnetic valve 35 is turned off, before turning off the hot water supply electromagnetic valve 35, the water path is cut off by the electric three-way valve 38 and then the hot water supply electromagnetic valve 35 is turned off, thereby reducing the water hammer. Can be.

The hot water supply source is not limited to the electric water heater 12, but may be a gas water heater, an oil water heater, a solar water heater, a heat pump water heater, or the like.

[0143]

According to the hot water supply device for a bathtub according to the first aspect, when the first hot water is supplied to the bathtub, a predetermined amount of the first hot water supply water is supplied, and a plurality of water levels at this time are set as a reference water level. By setting the set water level and storing the plurality of set water levels and the corresponding hot water supply amount in the storage means, the relationship between the plurality of set water levels and the corresponding hot water supply amount can be accurately determined without being affected by piping conditions or the like. Therefore, at the next hot water filling, the set water level can be designated and the hot water can be filled, and at the same time the hot water supply amount of the set water level specified based on the data stored in the storage means is supplied, and Can be filled with water accurately.

According to the hot water supply device for a bathtub of the second aspect,
In addition to the effect of the bathtub hot water supply device according to claim 1, after the filling is completed, the designated water level above the filled water level is designated, so that the designated water level is designated based on the data stored in the storage means. To supply water to the set water level, the water level can be changed after filling is completed.

According to the hot water supply device for a bathtub of the third aspect,
In addition to the effect of the bathtub hot water supply device according to claim 1 or 2, when there is data of the hot water supply amount of the designated set water level based on the data stored in the storage means at the next bath filling, If hot water is supplied for the amount of hot water and there is no data, the setting specified while checking the water level after supplying the hot water for the set water level with the hot water data at the set water level lower than the specified set water level Since the hot water is supplied to the water level and the amount of hot water at the set water level at this time is stored in the storage means, the hot water can be accurately filled even at the set water level where there is no data on the hot water supply amount.

According to the hot water supply device for a bathtub according to the fourth aspect,
In addition to the effects of the bathtub hot water supply device according to any one of claims 1 to 3, hot water is supplied to the set water level one level above the reference water level at the time of the first hot water filling, and the amount of hot water supplied at this time is equal to one set water level. It is stored in the storage means as a temporary hot water supply, and at the next hot water filling,
When there is no data of the hot water supply amount of the specified set water level and the data of the hot water supply amount of the set water level below this set water level, the set water level with the hot water supply data at the set water level above the specified set water level After the hot water supply amount obtained by subtracting the provisional hot water supply amount corresponding to the water level difference is supplied, the hot water is supplied to the set water level specified while checking the water level, and the hot water supply amount at the set water level at this time is stored in the storage means. Hot water can be accurately filled even at a set water level without hot water supply data, and data can be collected and used at the next hot water filling.

According to the hot water supply device for a bathtub according to claim 5,
In addition to the effect of the hot water supply device for a bathtub according to claim 4, when the hot water supply means has a hot water supply path, a circulation path, a circulation pump and a flow switch, at the next hot water filling, at a set water level higher than the specified water level specified. After supplying the amount of hot water that is obtained by subtracting the amount of provisional hot water corresponding to the water level difference from the set water level with the data of the amount of hot water, activate the circulation pump and check circulation with the flow switch. If the water level is higher than the connection position of the circulation path to the bathtub, it is possible to grasp that the water level can be accurately detected by the water level sensor provided in the circulation path, and accurately check the water level up to the specified set water level. Can supply hot water.

According to the hot water supply device for a bathtub according to claim 6,
In addition to the effects of the bathtub hot water supply device according to any one of claims 1 to 4, at the time of the first hot water filling, a hot water supply amount obtained by subtracting a predetermined hot water supply amount from the first hot water supply water amount is supplied and the circulation pump is operated. Check the circulation with the flow switch, continue to supply a predetermined amount of hot water and operate the circulation pump to check the circulation with the flow switch, and set the water level at which circulation is confirmed at least twice consecutively as the reference water level ,
The water level is surely higher than the connection position of the circulation path to the bathtub, the water level can be accurately detected by the water level sensor provided in the circulation path, and the reference water level can be accurately obtained.

According to the hot water supply device for a bathtub according to claim 7,
In addition to the effect of the hot water supply device for a bathtub according to claim 6, when the circulation is not confirmed by the flow switch when the circulation pump is operated, a predetermined amount of hot water is supplied until the circulation is confirmed at least twice continuously. Water is supplied at a time, and the water level when circulation is confirmed at least twice continuously is set as the reference water level.
For example, even when the initial hot water supply amount is small relative to the size of the bathtub or the connection position of the circulation path to the bathtub, the water level can be reliably positioned above the connection position of the circulation path, and at least two consecutive times. By setting the water level when circulation is confirmed as the reference water level, it is possible to reliably confirm that there is a water level above the connection position of the circulation path, and it is possible to set an optimal set water level based on the reference water level.

According to the hot water supply device for a bathtub according to claim 8,
In addition to the effect of the hot water supply device for a bathtub according to any one of claims 5 to 7, when the hot water is supplied at the set water level with data at the next hot filling, the flow path switching means goes to the circulation path to the hot water supply path. Since two pipes, a pipe and a return pipe, are communicated and hot water is supplied through these two pipes, the filling time can be reduced.

According to the hot water supply device for a bathtub of the ninth aspect,
In addition to the effects of the bathtub hot water supply device according to any one of claims 1 to 8, the display unit has a plurality of water level scales corresponding to a plurality of set water levels, and at the time of the first hot water filling, all the water level scales are displayed. In addition, since only one water level scale of the set water level is set to the display state at the time of next filling, it is possible to distinguish and display the first filling or the next filling on one display unit.

According to the hot water supply apparatus for a bath tub of the tenth aspect, in addition to the effect of the hot water supply apparatus for a bath tub according to any one of the first to ninth aspects, the water level in the bath tub is detected by the water level sensor by the function of the automatic hot water supply. When detecting that the water level has dropped below the set water level, the hot water is supplied from the set temperature to a temperature higher than the set temperature by a predetermined temperature according to the temperature of the hot water in the bathtub detected by the temperature sensor. In addition to compensating for the drop in the water level, the drop in the hot water temperature can be compensated for at the same time, and the temperature of the hot water to be automatically added can be restricted to an appropriate range.

According to the eleventh aspect of the present invention, in addition to the effect of the hot water supply apparatus for a bathtub according to any one of the first to tenth aspects, the electric water heater display section displays the information regarding the electric water heater. The display is turned off when it is unnecessary, and the reset is displayed when the electric water heater control unit is reset, regardless of the display state. Therefore, it is possible to surely confirm that the reset has been performed even when the display is turned off.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot water supply device for a bathtub according to an embodiment of the present invention.

FIG. 2 is a front view of a remote controller used in the bathtub hot water supply device.

FIG. 3 is a block diagram of the hot water supply device for a tub.

FIG. 4 is a flowchart of a filling operation performed by the bathtub hot water supply device.

FIG. 5 is a flowchart of first-time hot water filling of the bathtub hot water supply device.

FIG. 6 is a flowchart continued from FIG. 5;

FIG. 7 is a flowchart continued from FIG. 6;

FIG. 8 is a flowchart following FIG. 7;

FIG. 9 is a flowchart of the next hot water filling of the bathtub hot water supply device.

FIG. 10 is a flowchart continued from FIG. 9;

FIG. 11 shows an electric water heater control unit and an electric water heater display unit of the same hot water supply device for a bathtub, (a) is a block diagram,
(b) is an explanatory view showing a time display section of the electric water heater display section, (c)
FIG. 9 is an explanatory diagram showing a reset display operation.

[Explanation of symbols]

 11 Bathtub 12 Electric water heater 36 Flow rate sensor 37 Hot water supply path 38 Electric three-way valve as flow path switching means 39 Circulation path 40 Outgoing pipe 41 Return pipe 43 Circulation pump 44 Flow switch 45 Bath thermistor as temperature sensor 47 Water level sensor 48 Hot water supply means 53 Display unit 57 Water scale 73 CPU as control unit 75 RAM as storage unit 91 Electric water heater control unit 92 Electric water heater display unit

Claims (11)

[Claims] A hot water supply means for supplying hot water to the bathtub; a flow rate sensor for detecting an amount of hot water supplied to the bathtub by the hot water supply means; a water level sensor for detecting a water level of hot water supplied to the bathtub; A storage means for storing a relationship between a set water level and a corresponding hot water supply amount of hot water to be supplied to the bathtub, at the time of the first hot water supply to the bathtub, a predetermined initial hot water supply water supply amount is supplied by the hot water supply means, At this time, a plurality of set water levels are set with the water level detected by the water level sensor as a reference water level, and a plurality of set water levels and corresponding hot water supply amounts are stored in the storage means. A hot water supply device for supplying hot water at a set water level specified based on data stored in the storage means by the hot water supply means. 2. A controller according to claim 1, wherein after the filling is completed, the set water level above the filled water level is designated, and the hot water supply means sets the designated water level based on the data stored in the storage means. The hot water supply device for a bathtub according to claim 1, wherein hot water is supplied. 3. When the hot water is supplied next time, when there is data of the hot water supply amount of the designated set water level based on the data stored in the storage means at the time of hot water filling, the control unit supplies the hot water supply amount to the hot water supply means. If there is no data, the specified water level is set while checking the water level with the water level sensor after supplying the set water level with the hot water quantity data at the set water level below the specified set water level by the hot water supply means. The hot water supply device for a bathtub according to claim 1 or 2, wherein the hot water is supplied to the set water level by the hot water supply means, and the hot water supply amount at the set water level at this time is stored in the storage means. 4. The control section causes the hot water supply means to supply water to the set water level one level above the reference water level at the time of the first hot water filling, and stores the hot water supply amount at this time as a temporary hot water supply amount for one set water level in the storage means. At the next hot water filling, if there is no data of the hot water supply amount of the specified water level and the data of the hot water supply amount of the lower water level below this set water level, the hot water is supplied at the higher water level than the specified water level. Hot water is supplied by the hot water supply unit by subtracting the provisional hot water supply amount corresponding to the water level difference from the set water level with the amount data, and then the water is supplied by the hot water supply unit to the specified set water level while checking the water level with the water level sensor. The hot water supply device for a bathtub according to any one of claims 1 to 3, wherein the hot water supply amount at the set water level at this time is stored in the storage means. 5. A hot water supply means comprising: a hot water supply path for supplying hot water, a circulation path having an outgoing pipe and a return pipe connected between the hot water supply path and the bathtub, and provided with a water level sensor;
The control unit includes a circulation pump provided in the circulation path and a flow switch for detecting circulation of hot and cold water in the circulation path. After the hot water supply amount obtained by subtracting the provisional hot water supply amount corresponding to the water level difference from a certain set water level is supplied by hot water supply means, the circulation pump is operated and circulation is confirmed by a flow switch. Item 4
The hot water supply device for a bathtub according to the above. 6. A hot water supply means includes: a hot water supply path for supplying hot water; a circulation path having an outgoing pipe and a return pipe connected between the hot water supply path and the bathtub, and provided with a water level sensor;
The control unit includes a circulation pump provided in the circulation path and a flow switch for detecting circulation of hot water in the circulation path. The control unit determines a hot water supply amount obtained by subtracting a predetermined hot water supply amount from the first hot water supply amount at the time of the first hot water filling. The hot water is supplied by the hot water supply means and the circulation pump is operated to check the circulation with the flow switch.Then, the predetermined amount of hot water is supplied by the hot water supply means and the circulation pump is operated to check the circulation with the flow switch. The water level at which circulation is confirmed twice consecutively is set as a reference water level.
The hot water supply device for a bathtub according to any one of the above. 7. When the circulation is not confirmed by the flow switch when the circulation pump is operated, the control unit supplies the hot water by a predetermined hot water supply amount at least twice continuously until circulation is confirmed. 7. The hot water supply device for a bathtub according to claim 6, wherein a water level when circulation is confirmed successively times is set as a reference water level. 8. The hot water supply means includes flow path switching means for switching a flow path between a hot water supply path, an outgoing pipe, and a return pipe. 8. When hot water is supplied, the flow path switching means connects two pipes of an outgoing pipe and a return pipe of a circulation path to the hot water supply path, and feeds hot water through these two pipes. Hot water supply device for bathtub. 9. A plurality of water level scales corresponding to a plurality of set water levels, all the water level scales are displayed at the time of first filling, and only one of the set water levels at the next filling is displayed. The hot water supply device for a bathtub according to any one of claims 1 to 8, further comprising a display unit. 10. A temperature sensor for detecting the temperature of hot and cold water in the bathtub, wherein the control unit detects the temperature of the hot water in the bathtub when the water level in the bathtub falls below a set water level. 2. A function of an automatic hot water supply means for supplying hot water by a hot water supply means within a range from a set temperature to a temperature higher than the set temperature by a predetermined temperature according to the temperature of the hot water in the bathtub. 10. A hot water supply device for a bathtub according to any one of claims 9 to 9. 11. An electric water heater for heating and supplying hot water as hot water supply means, an electric water heater control unit for controlling the electric water heater, a display for the electric water heater, and turning off the display when unnecessary. The hot water supply device for a bathtub according to any one of claims 1 to 10, further comprising an electric water heater display unit for displaying that the electric water heater control unit has been reset when the electric water heater control unit is reset regardless of the display state.